Sean Combs had a bad day yesterday. The rapper showed up nearly an hour late to the unveiling of his own statue at the Madame Tussauds wax museum on West 42nd Street, bungled the pronunciation of the museum during his brief remarks, and then declined to do one-on-one interviews with reporters. Combs is whispered to be nearing an engagement to girlfriend Kim Porter. Combs’ rep said, “This rumor happens every year — it isn’t true.”